Sound-box for talking-machines.



M. A. .POSSONS.'

SOUNDYBO X FOR TALKiNG MACH|NES. APPLICATION FILED NOV. 27. 1914.

' mm gm, v Patented m. 28, 1915.

screwed into-the opening 4 of the head of the stylus andvis preferably provided with an Intermediate disk; or flange 16 which will re's't against the ,head 3.0f .thestylus bar when the. stem 141s screwed into position in the head. The opposite and vlonger end of fshaped portion 16. A thumb nut 18 is screwed upon theprojecting end' 19 of the.

. screw-threaded stem 14: anda celluloid disk thisv construction almost wholly cut out and therefore is not c'onveved tothe diaphragm;

20 is located between the thumb nut 18 and the outer end of the rubber ball 12 for the purpo'seof preventing friction and wear between the nut'18 and the rubber ball.

A star-shaped needle 21 is here shown as the special form of needle that is carried by the needle supporting arm 10. As this form of needle is fully shown and described in my Patent .No. 931,957. dated August .2ft, 1909 any further detailed description-of it here is unnecessary to enableit to be understood. I i

7 From the foregoing, attention is directed to the fact that thesound box 1 is supported by the needle through the encircling supple mental frame and independently of the stylus barv The sound waves areconveyed through the needle to the-portions 9 and 11 throughthe rubber ball to the head vof the stylus bar In this way the scraping of the needleon the record is so cushioned that it is practically not conveyed to the stylus bar and thereby not conveyed to the diaphragm 22. The' roughness of the record which causes a scraping of the needle isnot conveyed to .the diaphragm because it is so fine that it is completely absorbed by the ball thropgh which all sound waves are conveyed to the ,daanhragm, but whether this be true or not, I find: that this scraping noise is 1n the other hand, I find that the recorded sound waves are all completely conveyed to the diaphragmvand' that) the reproduction of the sound waves is much moreperfect than wherer the needle supports the sound box directly through the stylus bar .as n the sound boxes'in common use. Further than this by means of the adjustable thumb nut 18, the rubber ball may be compressed and tl'lereby the loudness of the tone is increased, or it can be turned to release the compression thereby softening the tone of the sound In fact,- I find that by this device the sound waves "can be modified or modul'ated"from' very soft to loud, or to any degree between very soft and loud to suit the operator. 1

I find by actual tests in order to get the full advantage of this improvement, it is necessary to use .star type of needle and that full benefit of the invention can be obtained only with that type of needle. I also find by actual test that to. get the best 1 results; it is nefzessary that'the "rubber-unember 12 ,be of a proximately spherical shape. Having this fully described mv invention what'lz claiiri and-desire to secure by Letters Patent is:

-1 The combination with a sound box of a talking machine of a supplemental frame yieldingly-connected therewith, a stylus bar,

a'needliegsupport connected to the frame,

wherebvf/the sound box is supported by the needle Findependentlyof the stylus bar, and a connection between the needle support and the free end of the stvlus bar.

2.;The combination with a sound box of a talking machine, of a supplemental. frame yieldingly connected therewith, a stylus bar,

' a needle support connected with the frame to support the box independently of the stylus barfyand a yielding connection betweent he needle support and the free end of the stylus bar.

The combination with a sound box of a talking machine, o f'a supplemental frame yieldingly connectedgvith the box, a stylus bar, a needle support connected with the supplemental frame independently of the stylus bar, a yielding connection between the needle support and the free end of the stylus bar, and means for regulating the tension of the last said yielding means.

4. The combination with a sound box of a talking machine, of a supplemental supporting frame yieldingly connected therewith,a stylus bar, a needle support connected with the said supplemental frame, a rubber connection between the needle support, and the free end-of the stylus bar, and means for compressing and releasing the tension of the rubber connection for modifying the conveyance of the sound waves to the stylus bar.

5. The combination with a sound box of a talking machine, ofa supplemental supportframe yieldingly connected therewith, av stylus bar, a needle support connected with the said frame, a yielding connection between the needle support and the free end of the stylus bar, and a star needle carried by the free end of the needlesupport.

6. The combination with a sound box of atalking machine, of a supplemental frame encircling the periphery of the sound box with a yielding connection between the frame'and the sound box, said supplemental frame having a projecting head portion, a stylus bar, a needle support carried by the said frame head, and a yielding connection between the needle support and the free end of the stylus bar.

7. The combination with a sound box of a talking machine, of a supplemental supporting frame encircling the periphery of the sound box, the encircling portion of the frame being inclosed Within a rubber sheath ing which intervenes between the frame and the sound box, the said frame having uprojecting-hend portion, a stylus bar, it needle support carried by the head portion a yield ing connection between the yielding support and the free end of the stylus bar, and means for regulating the tension of the yielding support for the purpose described.

8. The combination With e-sound box of a talking machine, of av supplemental supporting frame encircling the periphery of the sound box the encircling portion of the frame having at yielding portion between it and the sound box the said .iraine having a projecting head portion a stylus bar, a nee nection between the needle support and the.

free end of the stylus her. 10. The COLllOlIlRiLlOIl with a sound box or it talking machine, of e supplemental sup port cerrr, it

signature in the p v porting frame encirelin the sound box, the em:

rubber sheath mg between it and the sound boil, the v .Eroine having; a projecting heed portioin a stylus bar, a needle support carried by th head portion, the head portion carrying laterally extending nieniberfo rubber ball intervening between the loternlly tiling member and the free end of the stylus bun and. means for reguletting the tension of ti "ubbor bell. 11. The eonibinetion sound. box of stalking ninelii e, of olenientel supporting Eframe 1d vieldingly connected with tin i A .ie sound box thee-sound borehnvin v bar with a free end projecting the needle supl by irting frnznefa screw-threaded stern at "3; front the not a rubber ball e periphery or"; portion having;

connection between the screw--thren ilet i end an edj'ustall'ile nut on the stern t the tension of the rubber ball ose do erihed.

ln testinior y whereof I hereunto a lit/ii J le support and. 

